Police are appealing for public assistance to help locate missing Werribee woman Lalida Sanghachai.

The 31-year-old woman was last seen at her home on Janice Court on Monday, July 22.

Police and family have concerns for her welfare because her disappearance is out of character.

Police have released an image of Lalida in the hope someone recognises her.

Lalida is described as 165cm tall with long black hair and a slim build.

She was last seen wearing light blue jeans, a grey hoodie and white Nike runners.

Anyone who sights Lalida or has knowledge of her whereabouts is asked to contact the Werribee Police Station on 9742 9444.